Oregon County, Missouri ZIP Codes

5 ZIP Codes

Zip Code
City
Population ↓
65791Thayer4,425
65606Alton2,381
65692Koshkonong1,068
65778Myrtle430
65690Couch130

Overview of ZIP Codes in Oregon County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
5
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 5 ZCTAs in Oregon County, Missouri (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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